RecruitingPhase 2Drug trialA Phase II Study of Loncastuximab Tesirine as Consolidation Strategy in Patients With LBCL in PR After CAR T-cell TherapyTo learn if loncastuximab tesirine (called "lonca" in this informed consent form) can help to control large B-cell lymphoma that is relapsed or refractory after receiving CAR T-cell therapy. The safety and possible effects of the study therapy will also be studied.